Example usage for com.google.common.io ByteStreams nullOutputStream

Introduction

In this page you can find the example usage for com.google.common.io ByteStreams nullOutputStream.

Prototype

public static OutputStream nullOutputStream() 

Source Link

Document

Returns an OutputStream that simply discards written bytes.

Usage

From source file:org.eclipse.hawkbit.ui.management.targettable.BulkUploadHandler.java

@Override
public OutputStream receiveUpload(final String filename, final String mimeType) {
    try {// w ww  .  j av a 2 s  .  c o  m
        tempFile = File.createTempFile("temp", ".csv");
        progressBar.setVisible(false);
        targetsCountLabel.setVisible(false);
        return new FileOutputStream(tempFile);
    } catch (final FileNotFoundException e) {
        LOG.error("File was not found with file name {}", filename, e);
    } catch (final IOException e) {
        LOG.error("Error while reading file {}", filename, e);
    }
    return ByteStreams.nullOutputStream();
}

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From source file:com.facebook.buck.artifact_cache.HttpArtifactCacheBinaryProtocol.java

@VisibleForTesting
static byte[] createMetadataHeader(ImmutableSet<RuleKey> ruleKeys, ImmutableMap<String, String> metadata,
        ByteSource data) throws IOException {

    ByteArrayOutputStream rawOut = new ByteArrayOutputStream();
    Hasher hasher = HASH_FUNCTION.newHasher();
    try (DataOutputStream out = new DataOutputStream(new HasherOutputStream(hasher, rawOut))) {

        // Write the rule keys to the raw metadata, including them in the end-to-end checksum.
        out.writeInt(ruleKeys.size());/*from  ww  w  . j  a va2s.c o m*/
        for (RuleKey ruleKey : ruleKeys) {
            out.writeUTF(ruleKey.toString());
        }

        // Write out the metadata map to the raw metadata, including it in the end-to-end checksum.
        out.writeInt(metadata.size());
        for (Map.Entry<String, String> ent : metadata.entrySet()) {
            out.writeUTF(ent.getKey());
            byte[] val = ent.getValue().getBytes(Charsets.UTF_8);
            out.writeInt(val.length);
            out.write(val);
            if (out.size() > MAX_METADATA_HEADER_SIZE) {
                throw new IOException("Metadata header too big.");
            }
        }
    }

    // Add the file data contents to the end-to-end checksum.
    data.copyTo(new HasherOutputStream(hasher, ByteStreams.nullOutputStream()));

    // Finish the checksum, adding it to the raw metadata
    rawOut.write(hasher.hash().asBytes());

    // Finally, base64 encode the raw bytes to make usable in a HTTP header.
    byte[] bytes = rawOut.toByteArray();
    if (bytes.length > MAX_METADATA_HEADER_SIZE) {
        throw new IOException("Metadata header too big.");
    }
    return bytes;
}

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From source file:org.apache.beam.sdk.coders.StandardCoder.java

/**
 * Returns the size in bytes of the encoded value using this coder.
 *///ww w. j  a v a  2s . c  o  m
protected long getEncodedElementByteSize(T value, Context context) throws Exception {
    try (CountingOutputStream os = new CountingOutputStream(ByteStreams.nullOutputStream())) {
        encode(value, os, context);
        return os.getCount();
    } catch (Exception exn) {
        throw new IllegalArgumentException(
                "Unable to encode element '" + value + "' with coder '" + this + "'.", exn);
    }
}

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From source file:edu.byu.nlp.crowdsourcing.MultiAnnDatasetLabeler.java

/**
 * @param gold for computing confusion matrices for debugging
 *///from  www.  j ava2s .c om
public MultiAnnDatasetLabeler(MultiAnnModelBuilder multiannModelBuilder, PrintWriter debugOut,
        boolean predictSingleLastSample, String trainingOperations, DiagonalizationMethod diagonalizationMethod,
        boolean diagonalizationWithFullConfusionMatrix, int goldInstancesForDiagonalization,
        Dataset trainingData, String unannotatedDocumentWeight, IntermediatePredictionLogger predictionLogger,
        RandomGenerator algRnd) {
    // TODO (pfelt): in the future we'll probably want to NOT pass in the builder, but create a new builder 
    // for every label() request. The only problem with that right now is that it's not clear how
    // to build a Dataset from a collection of instances--it requires indexes generated from the original data???
    this.builder = multiannModelBuilder;
    this.predictSingleLastSample = predictSingleLastSample;
    this.trainingOperations = trainingOperations;
    this.diagonalizationMethod = diagonalizationMethod;
    this.diagonalizationWithFullConfusionMatrix = diagonalizationWithFullConfusionMatrix;
    this.goldInstancesForDiagonalization = goldInstancesForDiagonalization;
    this.statsOut = (statsOut == null) ? new PrintWriter(ByteStreams.nullOutputStream()) : statsOut;
    this.debugOut = (debugOut == null) ? new PrintWriter(ByteStreams.nullOutputStream()) : debugOut;
    this.unannotatedDocumentWeight = unannotatedDocumentWeight;
    this.predictionLogger = predictionLogger;
    this.rnd = algRnd;

    this.data = trainingData; // should get rid of this after we figure out how to pass instances into the label() method
}

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From source file:org.eclipse.hawkbit.ui.artifacts.upload.AbstractFileTransferHandler.java

protected OutputStream createOutputStreamForTempFile() throws IOException {

    if (isUploadInterrupted()) {
        return ByteStreams.nullOutputStream();
    }//  w  w  w.  j  av  a 2  s . com

    final File tempFile = File.createTempFile("spUiArtifactUpload", null);

    // we return the outputstream so we cannot close it here
    @SuppressWarnings("squid:S2095")
    final OutputStream out = new FileOutputStream(tempFile);

    tempFilePath = tempFile.getAbsolutePath();

    return out;
}

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From source file:com.github.jsdossier.Main.java

@VisibleForTesting
static void run(String[] args, FileSystem fileSystem) {
    Flags flags = Flags.parse(args, fileSystem);
    Config config = null;/*from  www . j  a v a 2s .  c  o  m*/
    try (InputStream stream = newInputStream(flags.config)) {
        config = Config.load(stream, fileSystem);
    } catch (IOException e) {
        e.printStackTrace(System.err);
        System.exit(-1);
    }

    if (flags.printConfig) {
        Gson gson = new GsonBuilder().setPrettyPrinting().create();
        String header = " Configuration  ";
        int len = header.length();
        String pad = Strings.repeat("=", len / 2);

        System.err.println(pad + header + pad);
        System.err.println(gson.toJson(config.toJson()));
        System.err.println(Strings.repeat("=", 79));
        System.exit(1);
    }

    Iterable<String> standardFlags = STANDARD_FLAGS;
    if (config.isStrict()) {
        standardFlags = transform(standardFlags, new Function<String, String>() {
            @Override
            public String apply(String input) {
                return input.replace("--jscomp_warning", "--jscomp_error");
            }
        });
    }

    ImmutableList<String> compilerFlags = ImmutableList.<String>builder()
            .addAll(transform(config.getSources(), toFlag("--js=")))
            .addAll(transform(config.getModules(), toFlag("--js=")))
            .addAll(transform(config.getExterns(), toFlag("--externs=")))
            .add("--language_in=" + config.getLanguage().getName()).addAll(standardFlags).build();

    PrintStream nullStream = new PrintStream(ByteStreams.nullOutputStream());
    args = compilerFlags.toArray(new String[compilerFlags.size()]);

    Logger log = Logger.getLogger(Main.class.getPackage().getName());
    log.setLevel(Level.WARNING);
    log.addHandler(new Handler() {
        @Override
        public void publish(LogRecord record) {
            System.err.printf("[%s][%s] %s\n", record.getLevel(), record.getLoggerName(), record.getMessage());
        }

        @Override
        public void flush() {
        }

        @Override
        public void close() {
        }
    });

    Main main = new Main(args, nullStream, System.err, config);
    main.runCompiler();
}

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From source file:com.android.tradefed.util.StreamUtil.java

/**
 * Create a {@link OutputStream} that discards all writes.
 */
public static OutputStream nullOutputStream() {
    return ByteStreams.nullOutputStream();
}

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From source file:org.jclouds.s3.filters.Aws4SignerBase.java

/**
 * hash input with sha256//from   w  ww .j av  a  2s. com
 *
 * @param input
 * @return hash result
 * @throws HTTPException
 */
public static byte[] hash(InputStream input) throws HTTPException {
    HashingInputStream his = new HashingInputStream(Hashing.sha256(), input);
    try {
        ByteStreams.copy(his, ByteStreams.nullOutputStream());
        return his.hash().asBytes();
    } catch (IOException e) {
        throw new HttpException("Unable to compute hash while signing request: " + e.getMessage(), e);
    }
}

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From source file:org.mapstruct.ap.testutil.runner.CompilingStatement.java

private void assertCheckstyleRules() throws Exception {
    if (sourceOutputDir != null) {
        Properties properties = new Properties();
        properties.put("checkstyle.cache.file", classOutputDir + "/checkstyle.cache");

        final Checker checker = new Checker();
        checker.setModuleClassLoader(Checker.class.getClassLoader());
        checker.configure(ConfigurationLoader.loadConfiguration(
                new InputSource(getClass().getClassLoader()
                        .getResourceAsStream("checkstyle-for-generated-sources.xml")),
                new PropertiesExpander(properties), true));

        ByteArrayOutputStream errorStream = new ByteArrayOutputStream();
        checker.addListener(new DefaultLogger(ByteStreams.nullOutputStream(), true, errorStream, true));

        int errors = checker.process(findGeneratedFiles(new File(sourceOutputDir)));
        if (errors > 0) {
            String errorLog = errorStream.toString("UTF-8");
            assertThat(true).describedAs("Expected checkstyle compliant output, but got errors:\n" + errorLog)
                    .isEqualTo(false);// w w w .  j ava 2s.c o  m
        }
    }
}

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From source file:net.minecraftforge.gradle.patcher.TaskGenBinPatches.java

private byte[] pack200(byte[] data) throws Exception {
    JarInputStream in = new JarInputStream(new ByteArrayInputStream(data));
    ByteArrayOutputStream out = new ByteArrayOutputStream();

    Packer packer = Pack200.newPacker();

    SortedMap<String, String> props = packer.properties();
    props.put(Packer.EFFORT, "9");
    props.put(Packer.KEEP_FILE_ORDER, Packer.TRUE);
    props.put(Packer.UNKNOWN_ATTRIBUTE, Packer.PASS);

    final PrintStream err = new PrintStream(System.err);
    System.setErr(new PrintStream(ByteStreams.nullOutputStream()));
    packer.pack(in, out);/*from  w  w w.j a  v a  2s  .co  m*/
    System.setErr(err);

    in.close();
    out.close();

    return out.toByteArray();
}

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